Creating 4CH/Quadrophonic audio... Reply #25 – 2005-05-24 12:57:52 Prologic 2s ability to decode SQ vinyl is limited. I believe it has better results on QS recordings. SQ is decodable in software though.To be honest making a 4 channel CD sounds a bit pointless as there is almost nothing that it will play back on. I'd suggest either matrix encoding it, or making a DTS Audio CD. DTS Audio CDs being playable in configurations up to 5.1 through software or through a CD player digitally connected to a DTS processor (like a cinema surround amp).